Question Problems to level the bed

[vojta.rasp]

Printer Model

Voron 2.4 350x350

Extruder Type

Clockwork 2

Cooling Type

Afterburner

Hi all,
Printer Voron 2.4 350x350, Manta, CB1, Tap, CAN; used filament PLA (which works perfectly on Trodon and ancient Ender)

I am newbie to the voron users community. I am struggling to make the 1st layer being consistently adhering across the bed on my "build in progress" printer.
I tried several things, with frustration I removed the magnetic self adhesive foil and make a heightmap on the bare heatbed (result attached).
Prior beforementioned I tried the X offset tuning several times (incl. finetuning during the print) but all the time the same result. on some places the layer stick on some other does not.
I tried even 11x11 mesh with bicubic algorithm in order to identify the problem.
I measured rails against the gantries and they are perpendicular with higher than 0.1mm accuracy
Double checked the belt tension.
All rails are moving smoothly and rails/carriages are lubricated.
Frame was check for its squareness during the build all the time incl. measuring the diagonals

any clue what to check, or try...

 

[NoGuru]

Looks like you have a pretty flat bed. So your issue is having material stick to the bed?
Is it PEI?
Have you tried cleaning it with soap and water?
Maybe increasing bed temps 5-10 degrees?

I use a Wham Bam PEX bed and everything sticks to it, no matter what.

 

[lord-carlos]

I would also like to know what bed you are using.

Have you run a probe accuracy test?

 

[vojta.rasp]

Hi,
thanks both of you.
1. Yes the probe was calibrated and pass thru the accuracy test
2. I am using PEI sheet (Forbot Voron one, which work just great on my Trodon just in different dimensions)
3. PEI has been cleaned by IPA, I can try to clean it with soap prior, but never have to. IPA worked fine to me so far.

Today the new magnetic foil will come so I will give an another shot.
Prior that I will try to wash the PEI with soap and I'll run the accuracy probe test just for good measures...

 

[anthony.sleck]

I run a Bambu print farm at work. The most important things I tell the users for sucessful prints, is cleaning the print surface. What we have found to be most sucessful is warm water and DAWN dishsoap, and touroughly dry with paper towels. Then once the build surface is back in the maching, wipe it down with IPA.

 

[vojta.rasp]

I applied a new magnetic foil, calibrated the Z offset, wash the PEI sheet several times with dishsoap (not having dawn soap) afterwards with IPA as athony recommended.
And after the finetuning the Z offset during during test print I got to the point where I can say that its day and night difference and I am progressing in a good direction, I have same smaller issues there but I did not fine tune other settings yet, so I think that it will get there.
Out of curiosity... now I am with the slightly better range about .21
Conclusion:
I went thru old height maps (I have OCD to find the cause) and it has to be caused by previously installed magnetic foil. On 11x11 bed mesh map I found weird waves running from left to right on the bed. So it leads me to conclusion that the problem was caused by and the bed map did not compensate it enough (did not notice during my tests, afterwards looking at it with fresh eye I did), as on same place the layer adhere on on some did not. When I am thinking about, the foil come rolled and might be root cause of the waves, regardless I let the foil rest for a several hours and even heat it up bit with hotbed in order to make it straight prior the application.

thank you gents for your inputs, you helped me a lot

 

[NoGuru]

Glad its working now. One other thing you can always do is slow down the first layer and also set a higher temp for the first layer.